Recent Submissions

  • Electro active repair of concrete demonstration of applicability 

    Polder, Rob; Geiker, Mette Rica (Chapter, 2017)
    Conventional concrete patch repairs have poor durability: 50% fail within ten years. A major cause is insufficient removal of contaminated concrete and insufficient steel cleaning. Chlorides left behind reactivate the ...
  • Freeze-Warping Box - Measuring the Deflection of a Composite Specimen 

    Stensholt, Margrethe Kuekiatngam (Master thesis, 2018)
    The freeze-warping box is used to measure the bi-material deflection of a small composite specimen beam during a freeze-thaw cycle. This bi-material deflection is caused by the thermal mismatch between the composite's ...
  • Using ALE-VMS to compute aerodynamic derivatives of bridge sections 

    Helgedagsrud, Tore Andreas; Bazilevs, Yuri; Korobenko, Artem; Mathisen, Kjell Magne; Øiseth, Ole (Journal article; Peer reviewed, 2018)
    Aeroelastic analysis is a major task in the design of long-span bridges, and recent developments in computer power and technology have made Computational Fluid Dynamics (CFD) an important supplement to wind tunnel experiments. ...
  • Implementation of a non-linear foundation model for soil-structure interaction analysis of offshore wind turbines in FAST 

    Krathe, V.L.; Kaynia, Amir Massoud (Journal article; Peer reviewed, 2017)
    Bottom-fixed offshore wind turbines (OWTs) involve a wide range of engineering fields. Of these, modelling of foundation flexibility has been given little priority. This paper investigates the modelling of bottom-fixed ...
  • Ductile Fracture of Steel Sheets under Dynamic Membrane Loading 

    Gruben, Gaute; Morin, David; Langseth, Magnus; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2017)
    Failure prediction assessment is conducted based on validated finite element simulations of impact tests performed on 1.8 mm dual-phase and 1.0 mm martensitic steel sheets. The sheets were clamped between two steel rings ...
  • Modeling of textured aluminum alloys used in a bumper system: Material tests and characterization 

    Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Lademo, Odd-Geir; Langseth, Magnus (Journal article; Peer reviewed, 2006)
    The three materials AA7108, AA7003 and AA6060, which can be parts of a typical bumper system in aluminum, were characterized in the present paper. Different tempers of the materials were studied. Through simple material ...
  • Modeling of material failure in foam-based components 

    Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Hanssen, Arve Grønsund; Langseth, Magnus (Journal article; Peer reviewed, 2004)
    The modeling of material failure in foam-filled beams was explored through numerical analyses with LS-DYNA. The study was based on previous physical tests on bending of square aluminum extrusions filled with aluminum foam. ...
  • Square aluminum tubes subjected to oblique loading 

    Reyes, Aase Gavina Roberg; Langseth, Magnus; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2003)
    The behavior and energy-absorbing capability of obliquely loaded square thin-walled aluminum columns in alloy AA6060 were studied through quasi-static experiments and FEM-analyses with LS-DYNA. The specimens were clamped ...
  • Design and finite element simulations of aluminium foam-filled thin-walled tubes 

    Hanssen, Arve Grønsund; Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Langseth, Magnus (Journal article; Peer reviewed, 2005)
    This paper presents experiences gained at SIMLab in modelling and design of aluminium-foam-filled tubes for structural applications. The main challenges for robust finite element simulations using explicit codes are outlined ...
  • Aluminum foam-filled extrusions subjected to oblique loading: experimental and numerical study 

    Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Langseth, Magnus (Journal article; Peer reviewed, 2004)
    The behavior of empty and foam-filled square thin-walled aluminum columns in alloy AA6060 subjected to quasi-static oblique loading was examined. Previous studies have shown that by introducing a load angle, the energy ...
  • Assessment of yield and fracture criteria using shear and bending tests 

    Reyes, Aase Gavina Roberg; Eriksson, Magnus; Lademo, Odd-Geir; Hopperstad, Odd Sture; Langseth, Magnus (Journal article; Peer reviewed, 2009)
    This article deals with the calibration of a fracture criterion that has been implemented in a material model in LS-DYNA. The failure process in thin-walled metallic materials is complex and often due to interaction between ...
  • Prediction of necking for two aluminum alloys under non-proportional loading by using an FE-based approach 

    Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Berstad, Torodd; Lademo, Odd-Geir (Journal article; Peer reviewed, 2008)
    Forming Limit Diagrams (FLDs) were found numerically for sheets under non-proportional loading by means of an FE-based Marciniak–Kuczynski (M-K) analysis. The material model used in the analysis includes two instability ...
  • Empty and foam-filled circular aluminium tubes subjected to axial and oblique quasi-static loading 

    Børvik, Tore; Hopperstad, Odd Sture; Reyes, Aase Gavina Roberg; Langseth, Magnus; Solomos, G.; Dyngeland, Torbjørn (Journal article; Peer reviewed, 2003)
    Tests on tubular columns made of the aluminium alloy 6060-T4 under axial and oblique, quasi-static loading have been performed. The columns were fixed at one extremity, while a concentrated force was applied at the other ...
  • Constitutive modeling of aluminum foam including fracture and statistical variation of density 

    Reyes, Aase Gavina Roberg; Hopperstad, Odd Sture; Berstad, Torodd; Hanssen, Arve Grønsund; Langseth, Magnus (Journal article; Peer reviewed, 2003)
    An existing constitutive model applicable for aluminum foam was evaluated. The model was implemented in LS-DYNA, and several test cases were analyzed and compared to experimental data. The numerical analyses consisted of ...
  • Crashworthiness of aluminum extrusions subjected to oblique loading: experiments and numerical analyses 

    Reyes, Aase Gavina Roberg; Langseth, Magnus; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2002)
    Oblique loading was studied through quasi-static experiments and numerical simulations. The behavior of square aluminum columns in alloy AA6060 subjected to quasi-static oblique loading was investigated experimentally for ...
  • Mortar Water Content Impact on Masonry Strength 

    Slapø, Fredrik; Kvande, Tore; Høiseth, Karl Vincent; Hisdal, Jorun-Marie; Lohne, Jardar (Journal article, 2018)
    Building without sufficient knowledge can entail risk concerning structural safety and resource efficiency. The authors of this paper share the view that mortar water content are subject to large variations, and that the ...
  • Cuttings Transport Modeling - Part 1: Specification of Benchmark Parameters with a Norwegian Continental Shelf Perspective 

    Busch, Alexander; Islam, Aminul; Martins, Dwayne Werner; Iversen, Fionn; Khatibi, Milad; Johansen, Stein Tore; Time, Rune Wiggo; Meese, Ernst A. (Journal article; Peer reviewed, 2018)
    In oil and gas drilling, cuttings transport related problems are a major contributor to well downtime and costs. As a result, solutions to these problems have been extensively researched over the years, both experimentally ...
  • Modeling and simulation of the soft palate for improved understanding of the obstructive sleep apnea syndrome 

    Liu, Hongliang (Doctoral theses at NTNU;2018:101, Doctoral thesis, 2018)
    Obstructive sleep apnea (OSA) influences a large part of the population and is increasingly recognized as a major global health problem. For OSA patients, the collapse of the soft palate has been clarified to be a common ...
  • One algorithm, two timber bridges built in Orkdal, Norway 

    Mork, John Haddal; Luczkowski, Marcin; Dyvik, Steinar Hillersøy; Manum, Bendik; Rønnquist, Anders (Chapter, 2017)
    The building industry is about to embrace mass customization. In recent years, iconic buildings have demanded a new way of approaching design and manufacturing. We, among others, believe that parametrization is key to fully ...
  • Why we will all be looking for a new job soon, true story based on study case of Orkdal footbridge 

    Luczkowski, Marcin; Dyvik, Steinar Hillersøy; Mork, John Haddal; Rønnquist, Anders (Chapter, 2017)
    The fourth industrial revolution, already present in the several industries, is now entering the field of civil engineering. Digital fabrication, mass customization, robot arms and drones are connected within the building ...

View more